Evaluation of morphometric parameters using geographic information system coupled with digital elevation model: A case study from Gumara watershed, Ethiopia

Accelerated soil erosion is a worldwide problem because of its economic and environmental impacts. Enfraz watershed is one of the most erosion-prone watersheds in the highlands of Ethiopia, which received little attention. This study was, therefore, carried out to spatially predict the soil loss rate of the watershed with a Geographic Information System (GIS) and Remote Sensing (RS). Revised Universal Soil Loss Equation (RUSLE) adapted to Ethiopian conditions was used to estimate potential soil losses by utilizing information on rainfall erosivity (R) using interpolation of rainfall data, soil erodibility (K) using soil map, vegetation cover (C) using satellite images, topography (LS) using Digital Elevation Model (DEM) and conservation practices (P ) using satellite images. Based on the analysis, about 92.31% (5914.34 ha) of the watershed was categorized none to slight class which under soil loss tolerance (SLT) values ranging from 5 to 11 tons ha-1 year-1. The remaining 7.68% (492.21 ha) of land was classified under moderate to high class about several times the maximum tolerable soil loss. The total and an average amount of soil loss estimated by RUSLE from the watershed was 30,836.41 ton year-1 and 4.81 tons ha-1year-1, respectively.Int. J. Agril. Res. Innov. & Tech. 5 (2): 21-30, December, 2015

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DISASTER RECOVERY THROUGH PREDICTION OF SAFE ROUTE USING DEM LEVELS

Asian Journal of Pharmaceutical and Clinical Research ◽

10.22159/ajpcr.2017.v10s1.19539 ◽

2017 ◽

Vol 10 (13) ◽

pp. 20

Author(s):

Sangavi Vp ◽

N Mounika ◽

S Graceline Jasmine

Keyword(s):

Information System ◽

Geographic Information System ◽

Digital Elevation Model ◽

Tamil Nadu ◽

Java Application ◽

Digital Elevation ◽

Safe Area ◽

Elevation Model ◽

Evacuation Route ◽

Model Layer

When a disaster occurs, the normal commutation routes are disrupted. People get stuck at these disaster points and would be in trouble, hence people in those areas find it difficult to communicate and evacuation route to safe area is unknown. The aim of the paper is to predict safe routes to reach the refuge point from the disaster point. The prototype was developed using Arc geographic information system runtime SDK for Java Application and APIs in Eclipse. The system was developed with digital elevation model layer, and route layer for India basemap focused to Tamil Nadu. The safe route is found based on the elevation values of the area from the disaster point to a safe point. The developed system could be used by the relief providers to reach the disaster point and rescue victims.

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The methods morphometric analysis’ of basinal systems’ within mountain territories using GIS (case study of the Chornogora’s part of Prut’s basin)

Visnyk of the Lviv University. Series Geography ◽

10.30970/vgg.2012.40.2085 ◽

2012 ◽

Vol 2 (40) ◽

pp. 68-90

Author(s):

A. Marchak

Keyword(s):

Key Words ◽

Data Base ◽

Digital Elevation Model ◽

Morphometric Analysis ◽

Software Package ◽

Morphometric Parameters ◽

Geoinformation Systems ◽

Digital Elevation ◽

Elevation Model

In the article is given the methods of fulfillment consecutive stages of the relief morphometric analysis of basinal systems' within mountain territories using software package ESRI ArcGIS Desktop 9.3 (case study of the Chornogora's part of Prut's basin). The results of fulfillment this algorithm is developed digital elevation model, range of analytical and synthetic morphometric maps and hypsographical profiles, circular charts, bar diagrams, plots and tables of relief's various morphometric parameters as well as apportionment for their further complex morphogenetical analysis. Key words: morphometric analysis of the relief, geoinformation systems, geoinformation data base, digital elevation models, morphometric parameters of the relief, analytical and synthetic morphometric maps.

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